I looked them over pretty good. They have the internals of the Cimarron conversion models. This means they work like C&B models. For a deliberate, smooth shooter, they'll work great and look authentic. If you jerk or push that kind of lockwork too hard, you'll get glitches like we saw at our Shoot Off at Mule Camp last year. They're real nice but like all machinery, you have to stay within it's capabilities.